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Triac Ramp Up & Down Circuit

Sparky1221

Oct 3, 2018
1
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Oct 3, 2018
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Need help designing a circuit that will automatically ramp up/down a triac based on input voltage change to a triac trigger pin. See input voltage and output voltage plots.

This will be used to control a triac for a motor. Would like to have a soft start (ramp up) on initial startup and the ability to ramp it down to say half speed by changing the triac's trigger voltage.

Any ideas?
 

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kellys_eye

Jun 25, 2010
6,514
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Jun 25, 2010
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6,514
This is usually achieved by pulse modulation of the gate. Google ''slow start" circuits.
 
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